A pesticide composition and use thereof

Abstract

The present application belongs to the technical field of pesticide insecticide, and discloses a kind of pesticide composition and its use, the pesticide composition includes active ingredient A and active ingredient B, the active A is dimpropyridaz, the active ingredient B is one of the compound of formula I: (formula I) or formula II compound: (formula II), the mass ratio of the active ingredient A and active ingredient B is 1:80~80:1.The pesticide composition of the present application can effectively overcome the resistance of pests to single pesticide by complementary mechanism, has significant synergistic effect, wider control spectrum and persistence, and can reduce the cost of field management.

Description

Technical Field

[0001] This invention belongs to the field of pesticide insecticide technology and discloses a pesticide composition and its uses. Background Technology

[0002] Dimpropyridaz is a pyrazole amide insecticide developed by BASF with a novel mechanism of action. It is mainly used for fruit trees and vegetables, field crops such as soybeans, cotton, grains, and potatoes, as well as flowers and ornamental plants. It controls pests of Lepidoptera, Coleoptera, Diptera (flies, mosquitoes, vegetable leafminers, etc.), Hemiptera, and Thysanoptera, and is especially effective against piercing-sucking pests such as aphids, whiteflies, and psyllids.

[0003] Chemical methods for pest control offer advantages such as high efficiency, speed, ease of operation, and low cost. They can rapidly control pest spread by killing, inhibiting, or interfering with the physiological metabolism of pests, especially providing emergency control during large-scale outbreaks. Their broad-spectrum nature allows them to act on multiple pests simultaneously, and the diverse formulations (such as spraying and fumigation) cater to different scenarios. However, this method also has significant drawbacks: environmental pollution (pesticide residues contaminate soil, water sources, and the food chain), the development of pesticide resistance (long-term use leads to increased pest adaptability), harm to non-target organisms (accidental killing of beneficial insects and natural enemies, disrupting the ecological balance), and residual hazards (threatening human health). Therefore, it is crucial to scientifically select low-toxicity, high-efficiency pesticides and apply them according to regulations to balance control effectiveness with environmental sustainability. Summary of the Invention

[0004] To address the aforementioned issues, this invention scientifically combines dimpropyridaz with any one of the compounds of formula I and formula II with different mechanisms of action, screens effective control targets and reasonable compounding ratios, which can significantly improve control efficacy, broaden the insecticidal spectrum, delay drug resistance development, reduce the probability of pests developing single resistance through multi-target action, and reduce costs, demonstrating the comprehensive advantages of scientific pesticide use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pesticide composition comprising active ingredient A and active ingredient B, wherein active ingredient A is dimpropyridaz, and active ingredient B is a compound of formula I: Compounds of Formula I or Formula II: In one of (Formula II), the mass ratio of active ingredient A to active ingredient B is 80:1 to 1:80.

[0006] Furthermore, the active ingredient B is a compound of formula I, and the mass ratio of active ingredient A to active ingredient B is 1:50 to 40:1, or any value within the above range.

[0007] Furthermore, the active ingredient B is a compound of formula II, and the mass ratio of active ingredient A to active ingredient B is 1:40 to 60:1, or any value within the above range.

[0008] Furthermore, the active ingredient B is a compound of formula I, and the mass ratio of active ingredient A to active ingredient B is 1:50 to 20:1, or any value within the above range.

[0009] Furthermore, the active ingredient B is a compound of formula I, and the mass ratio of active ingredient A to active ingredient B is 1:35 to 20:1, or any value within the above range.

[0010] Furthermore, the active ingredient B is a compound of formula II, and the mass ratio of the active ingredient A to the active ingredient B is 1:22 to 40:1, or any value within the above range.

[0011] Furthermore, the pesticide composition, in addition to the active ingredient, also contains pesticide-acceptable auxiliary ingredients, which are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

[0012] Furthermore, the pesticide composition is prepared as a solid formulation or a liquid formulation.

[0013] Furthermore, the solid formulation is a water-dispersible granule or a wettable powder; the liquid formulation is a suspension concentrate, emulsifiable concentrate, water emulsion, microemulsion, or dispersible oil suspension.

[0014] The present invention also discloses the use of the pesticide composition described above for the control of crop pests.

[0015] Furthermore, the pests mentioned are lepidopteran or hemiptera pests.

[0016] Furthermore, the Lepidoptera pests mentioned are beet armyworm, diamondback moth, cabbage caterpillar, and rice stem borer; the Hemiptera pests mentioned are rice planthopper.

[0017] The beneficial effects of this invention are as follows:

[0018] 1) The pesticide composition of the present invention achieves a synergistic effect on multiple target pests by rationally combining insecticides with different mechanisms of action.

[0019] 2) The inventive composition of the present invention expands the insecticidal spectrum, can cover different target pests and delay the development of drug resistance. Detailed Implementation

[0020] To better understand the essence of the present invention, the following embodiments further illustrate the content of the present invention, but these should not be regarded as limitations on the present invention. The content mentioned in the embodiments is not a limitation of the present invention, and the selection of material formulations can be adapted to local conditions without having a substantial impact on the results.

[0021] Preparation method of formulation.

[0022] 1. Suspension preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, water is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling and finally homogenization filtration to obtain the suspension product.

[0023] 2. Preparation method of emulsifiable concentrate: According to the formula ratio, add the measured active ingredients, solvent and co-solvent into the mixing tank and stir to dissolve them. Then add the emulsifier, and use the remaining solvent to make up the balance. Stir evenly in the mixing tank, and filter to obtain the emulsifiable concentrate required by the present invention.

[0024] 3. Preparation method of dispersible oil suspension: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, oil is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling and finally homogenization filtration to obtain the dispersible oil suspension product.

[0025] 4. Preparation method of water-dispersible granules: According to the formulation ratio of the example, add the active ingredients to the carrier, and add surfactants and other functional additives to it. Mix, and after air jet pulverization, add 10-25% water. Then knead, granulate, dry and sieve to obtain water-dispersible granules; or spray water, granulate and dry the pulverized powder in a fluidized bed granulator, and then sieve to obtain the product.

[0026] 5. Preparation method of wettable powder: According to the formula ratio, the active ingredients, dispersant, wetting agent and filler are mixed and stirred evenly in a mixer. After being pulverized by an air jet mill, they are mixed evenly again to prepare the wettable powder of the composition of the present invention.

[0027] Formulation preparation example:

[0028] Preparation Example 1: 22% dimpropyridaz·Formula I compound suspension (10:1)

[0029] Formula composition: 20% dimpropyridaz, 2% Formula I compound, 2% calcium dodecylbenzenesulfonate, 1% sodium alkyl polyoxyethylene ether sulfonate, 3% fatty alcohol polyoxyethylene ether phosphate, 0.25% xanthan gum, 1% magnesium aluminum silicate, 5% ethylene glycol, 0.1% isothiazolinone, 0.5% silicone oil, deionized water to make up the balance;

[0030] Preparation Example 2: 22% dimpropyridaz·Formula II compound suspension (10:1)

[0031] Formula composition: 20% dimpropyridaz, 2% Formula II compound, 0.5% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 4% castor oil polyoxyethylene ether phosphate, 2% sodium polycarboxylate, 0.25% xanthan gum, 4% ethylene glycol, 0.1% potassium benzoate, 0.5% silicone oil, deionized water to make up the balance.

[0032] Preparation Example 3: 15% dimpropyridaz·Formula I compound emulsifiable concentrate (1:1)

[0033] Formula composition: 7.5% dimpropyridaz, 7.5% Formula I compound, 15% DMF, 15% glycerol fatty acid ester polyoxyethylene ether, 2% sodium dodecyl sulfate, 25% fatty alcohol polyoxyethylene ether phosphate, xylene to make up the balance.

[0034] Preparation Example 4: 11% dimpropyridaz·formula II compound emulsion (1:10)

[0035] Formulation composition: 1% dimpropyridaz, 10% Formula II compound, 12% EO / PO block copolymer, 13% acetophenone, 15% N-octylpyrrolidone, 2% succinate sulfonate, and tricresyl to make up the balance.

[0036] Preparation Example 5: 18% dimpropyridaz·Formula I compound dispersible oil suspension (1:2)

[0037] Formula composition: 6% dimpropyridaz, 12% Formula I compound, 2% sodium dodecyl sulfate, 12% isotridecyl alcohol polyoxyethylene ether, 3% Guerbert alcohol polyoxyethylene ether, 1% silica, 1% organobentonite, 15% 200# solvent oil, methyl oleate to make up the balance.

[0038] Preparation Example 6: 12% dimpropyridaz·Formula II compound dispersible oil suspension (5:1)

[0039] Formula composition: 10% dimpropyridaz, 2% Formula II compound, 5% alkylaryl polyoxyethylene ether polyoxypropylene ether, 10% styrene-phenol polyoxyethylene ether, 1% sodium dodecyl sulfate, 2% sodium polycarboxylate, 1% naphthalene sulfonate formaldehyde condensate, soybean oil to make up the balance.

[0040] Preparation Example 7: 24% dimpropyridaz·Formula I compound water-dispersible granules (1:5)

[0041] Formula composition: 4% dimpropyridaz, 20% Formula I compound, 10% lignin sulfonate, 5% calcium dodecylbenzene sulfonate, 2% succinate sulfonate, 5% silica, 25% starch, kaolin to make up the balance.

[0042] Preparation Example 8: 32% dimpropyridaz·Formula II compound water-dispersible granules (15:1)

[0043] Formula composition: 30% dimpropyridaz, 2% compound II, 10% sodium polycarboxylate, 3% stretching powder BX, 2% sodium dodecylbenzenesulfonate, 5% white sugar, and kaolin to make up the balance.

[0044] Preparation Example 9: 33% dimpropyridaz·Formula I compound wettable powder (1:10)

[0045] Formula composition: 3% dimpropyridaz, 30% Formula I compound, 5% sodium lignosulfonate, 2% sodium alkyl polyoxyethylene ether sulfonate, 2% BX powder, 5% silica, and kaolin to make up the balance.

[0046] Preparation Example 10: 21% dimpropyridaz·Formula II compound wettable powder (1:20)

[0047] Formula composition: 1% dimpropyridaz, 20% compound of formula II, 2% sodium dodecyl sulfate, 4% sodium lignosulfonate, 5% sodium octylphenol polyoxyethylene ether sulfonate, 8% kaolin, 10% silica, and bentonite to make up the balance.

[0048] Example 1: Indoor bioactivity test of diamondback moth and beet armyworm, lepidopteran pests.

[0049] The test reference was NY / T 1154.6-2006 "Guidelines for Indoor Biological Testing of Pesticides - Insecticides - Part 6: Insecticidal Activity Test - Immersion Method".

[0050] Experimental targets: third instar larvae of diamondback moth and beet armyworm. Target insects with similar physiological states were selected for this experiment.

[0051] Instruments and equipment: electronic balance, insect cage, volumetric flask, petri dish, beaker, pipette, tweezers, filter paper, marker pen, stopwatch.

[0052] Test reagents: dimpropyridaz, compound I, and compound II technical grade;

[0053] Reagent preparation: Dissolve the test drug in a suitable solvent, and then dilute it with a 0.1% Tween 80 aqueous solution. Based on the drug activity, set up 5 series of mass concentrations using a proportional method.

[0054] Chemical treatment: After immersing the test insects in the drug solution for 5 seconds, absorb the excess solution with filter paper and transfer the test insects to normal rearing conditions. Each treatment was repeated 4 times, with 20 insects immersed in each replicate. A corresponding organic solvent treatment without the drug was included as a control.

[0055] Investigation: Investigate the mortality of test insects 48 hours after treatment, and record the total number of insects and the number of dead insects.

[0056] Calculation method:

[0057] Calculate the mortality rate for each treatment based on the survey data. Use the following formula:

[0058]

[0059] In the formula:

[0060] P — Mortality rate, expressed as a percentage (%);

[0061] K —This indicates the number of dead insects, expressed in heads;

[0062] N — This indicates the total number of insects treated, in units of heads.

[0063]

[0064] In the formula:

[0065] P 1 —Adjusted mortality rate, in percentages (%);

[0066] P t —The mortality rate is expressed as a percentage (%).

[0067] P 0 — Mortality rate in blank control group, expressed as a percentage (%).

[0068] If the control mortality rate is <5%, no correction is needed; if the control mortality rate is between 5% and 20%, correction should be performed according to the corrected mortality rate formula; if the control mortality rate is >20%, the trial needs to be repeated.

[0069] The DPS statistical analysis system was used to analyze the data and obtain the virulence regression equation, correlation coefficient, and LC. 50 The value is used to evaluate the activity of the test reagent on the biological sample.

[0070] The co-toxicity coefficient (CTC value) of the mixture is calculated using the following formula:

[0071]

[0072] In the formula:

[0073] YOU —Measured toxicity index of the mixture;

[0074] S LC of standard insecticides 50 The unit is milligrams per liter (mg / L);

[0075] M LC of the mixture 50 The unit is milligrams per liter (mg / L).

[0076]

[0077] In the formula:

[0078] TTI —Theoretical toxicity index of the mixture;

[0079] THE A —A. Toxicity index of drug A;

[0080] P A —The percentage content of drug A in the mixture, expressed as a percentage (%).

[0081] THE B —Toxicity index of drug B;

[0082] P B —Percentage content of agent B in the mixture, expressed as percentage (%).

[0083]

[0084] In the formula:

[0085] CTC —Cotoxicity coefficient;

[0086] YOU —Measured toxicity index of the mixture;

[0087] TTI —Theoretical toxicity index of mixed preparations.

[0088] Co-toxicity coefficient of compound CTC ≥120 exhibits a synergistic effect; CTC≤80It exhibits antagonistic effects; 80 < CTC <120 exhibits an additive effect.

[0089] The results of the indoor tests are shown in the table below:

[0090] Table 1 Results of indoor bioactivity tests of dimpropyridaz combined with compound I on diamondback moth.

[0091]

[0092] Indoor bioactivity tests showed that combining dimpropyridaz with compound I in a reasonable ratio had a good control effect on diamondback moth. When the mass ratio of dimpropyridaz to compound I was 1:20 to 40:1, the co-toxicity coefficient was greater than 120, indicating a synergistic effect. When the mass ratio of dimpropyridaz to compound I was 20:1, the co-toxicity coefficient was the highest, reaching 156.435.

[0093] Table 2 Results of indoor bioactivity tests of dimpropyridaz combined with compound I on beet armyworm.

[0094]

[0095] Indoor bioactivity tests showed that combining dimpropyridaz with compound I in a reasonable ratio had a good control effect on beet armyworm. The co-toxicity coefficient of dimpropyridaz to compound I was greater than 120 when the mass ratio was 1:35 to 20:1, indicating a synergistic effect. The co-toxicity coefficient was highest at 208.933 when the mass ratio was 1:1.

[0096] Table 3 Results of indoor bioactivity tests of dimpropyridaz combined with compound II on diamondback moth.

[0097]

[0098] Indoor bioactivity tests showed that combining dimpropyridaz with compound II in a reasonable ratio had a good control effect on diamondback moth. When the mass ratio of dimpropyridaz to compound II was 1:40 to 60:1, the co-toxicity coefficient was greater than 120, indicating a synergistic effect. When the mass ratio of dimpropyridaz to compound II was 10:1, the co-toxicity coefficient reached its maximum of 170.666.

[0099] Table 4 Results of indoor bioactivity tests of dimpropyridaz and compound II in beet armyworm.

[0100]

[0101] Indoor bioactivity tests showed that combining dimpropyridaz with compound II in a reasonable ratio had a good control effect on beet armyworm. When the mass ratio of dimpropyridaz to compound II was 1:22 to 40:1, the co-toxicity coefficient was greater than 120, indicating a synergistic effect; when the mass ratio of dimpropyridaz to compound II was 8:1, the co-toxicity coefficient was the highest, reaching 259.329.

[0102] Example 2: Indoor bioactivity test of rice planthopper.

[0103] Test target: Brown planthopper ( Nilaparvata lights ), 3rd instar nymph.

[0104] Test reagents: dimpropyridaz, compound I technical grade; the test reagents were dissolved in a suitable solvent to prepare a stock solution of a certain concentration, and then the stock solution was diluted with 0.1% Tween-80 aqueous solution to make 5 series.

[0105] Experimental method: The pressure of the Potter spray tower was stabilized at 1.47 × 10⁻⁶. 5 Pa, the spray nozzle was first cleaned twice with acetone, then twice with distilled water. Forty test insects of uniform physiological condition were selected using a brush and placed in a culture dish. The dish was then placed on the bottom of the Potter spray tower for quantitative spraying, with a spray volume of 1 mL. After the solution settled for 1 minute, it was removed. Each treatment was repeated four times, with a 0.1% Tween-80 aqueous solution used as a blank control. The treated insects were then placed in an intelligent artificial climate chamber with a temperature of (25±1)℃, a relative humidity of 60%~80%, and a photoperiod of 16L:8D. Mortality was checked after 48 hours; insects that did not move at all when gently touched with a size 0 brush were considered dead.

[0106] Calculation method:

[0107] Calculate the mortality rate for each treatment based on the survey data. Use the following formula:

[0108]

[0109] In the formula:

[0110] P — Mortality rate, expressed as a percentage (%);

[0111] K —This indicates the number of dead insects, expressed in heads;

[0112] N— This indicates the total number of insects treated, in units of heads.

[0113]

[0114] In the formula:

[0115] P 1 —Adjusted mortality rate, in percentages (%);

[0116] P t —The mortality rate is expressed as a percentage (%).

[0117] P 0 — Mortality rate in blank control group, expressed as a percentage (%).

[0118] If the control mortality rate is <5%, no correction is needed; if the control mortality rate is between 5% and 20%, correction should be performed according to the corrected mortality rate formula; if the control mortality rate is >20%, the trial needs to be repeated.

[0119] The DPS statistical analysis system was used to analyze the data and obtain the virulence regression equation, correlation coefficient, and LC. 50 The value is used to evaluate the activity of the test reagent on the biological sample.

[0120] The co-toxicity coefficient (CTC value) of the mixture is calculated using the following formula:

[0121]

[0122] In the formula:

[0123] YOU —Measured toxicity index of the mixture;

[0124] S LC of standard insecticides 50 The unit is milligrams per liter (mg / L);

[0125] M LC of the mixture 50 The unit is milligrams per liter (mg / L).

[0126]

[0127] In the formula:

[0128] TTI —Theoretical toxicity index of the mixture;

[0129] THE A —A. Toxicity index of drug A;

[0130] PA —The percentage content of drug A in the mixture, expressed as a percentage (%).

[0131] THE B —Toxicity index of drug B;

[0132] P B —Percentage content of agent B in the mixture, expressed as percentage (%).

[0133]

[0134] In the formula:

[0135] CTC —Cotoxicity coefficient;

[0136] YOU —Measured toxicity index of the mixture;

[0137] TTI —Theoretical toxicity index of mixed preparations.

[0138] Co-toxicity coefficient of compound CTC ≥120 exhibits a synergistic effect; CTC≤80 It exhibits antagonistic effects; 80 < CTC <120 exhibits an additive effect.

[0139] The results of the indoor tests are shown in the table below:

[0140] Table 5 Results of indoor bioactivity tests of dimpropyridaz combined with compound I on rice planthoppers.

[0141]

[0142] Indoor bioactivity tests showed that combining dimpropyridaz with compound I in a reasonable ratio had a good control effect on rice planthoppers. When the mass ratio of dimpropyridaz to compound I was 1:50 to 20:1, the co-toxicity coefficient was greater than 120, indicating a synergistic effect. When the mass ratio of dimpropyridaz to compound I was 1:5, the co-toxicity coefficient was the highest, reaching 189.349.

[0143] Example 3: Field efficacy test of pesticides for controlling diamondback moth and beet armyworm.

[0144] Experimental location: The experiment was conducted in Xujiabu Village, Shengzhuang Town, Taishan District, Tai'an City, Shandong Province. The soil fertility of the experimental site was medium to high, the terrain was flat, the irrigation conditions were good, the cultivation conditions in the experimental area were consistent, and the occurrence of pests was moderate.

[0145] Control targets: diamondback moth and beet armyworm.

[0146] Experimental design: plot area 20 m² 2 Repeat 4 times, using randomized block arrangements.

[0147] Experimental method: In the early stage of pest occurrence, use an HM-16A backpack electric sprayer at a rate of 900 kg / hm². 2 The appropriate amount of pesticide solution was sprayed evenly on both sides of the cabbage leaves. The initial insect population was assessed before application, and the control effect was assessed on days 3 and 10 after application. A random 5-point sampling method was used, with 4 plants marked at each point. 20 plants were selected from each plot for fixed-point insect population counting, and the insect population reduction rate and control effect were calculated.

[0148] The method for calculating drug efficacy is as follows:

[0149]

[0150]

[0151] The results of the field efficacy trials are shown in the table below:

[0152] Table 6 Results of field efficacy trials for controlling diamondback moth and beet armyworm.

[0153]

[0154] Table 6 shows that the combination of dimpropyridaz and compound I has a good control effect on cabbage looper and diamondback moth. Three days after application, the dimpropyridaz-compound I combination formulation at 20 g / hm²... 2 The control efficacy against the cabbage looper was 88.37%–94.66%. Ten days after application, the field control efficiencies of the following preparations against the cabbage looper and diamondback moth were 92.66%, 95.83%, and 98.85%, respectively: Preparation 7: 24% dimpropyridaz•Formula I compound water-dispersible granules (1:5); Preparation 5: 18% dimpropyridaz•Formula I compound oil-dispersible suspension (1:2); and Preparation 3: 15% dimpropyridaz•Formula I compound emulsifiable concentrate (1:1). These efficiencies were significantly higher than the control efficacy against the single-agent control.

[0155] Example 4: Field efficacy test for controlling beet armyworm.

[0156] Experimental location: Cabbage fields in Xizhai Village, Xiangquan Town, He County, Ma'anshan City, Anhui Province. The soil fertility was moderate, the texture was loam, and the pH value was 6.8. During the experiment, the cultivation and water and fertilizer management of each plot were kept consistent, which met the requirements of agricultural production practice.

[0157] Experimental crop: Cabbage.

[0158] Experimental target: Beet armyworm.

[0159] Experimental Design: This experiment consisted of 6 treatments, each with 4 replicates, for a total of 24 plots arranged in a randomized block design. The plot area was 30m². 2 .

[0160] Experimental Methods: The experiment was conducted when cabbage was in the rosette stage and the beet armyworm was in its early larval stages. Different concentrations of pesticide were prepared using a two-stage dilution method. Each treatment was then applied once using a Weishi NS-16 manual sprayer (working pressure 0.15–0.40 MPa, nozzle diameter 0.9 mm). The control area was sprayed with an equal volume of water. Throughout the experiment, all other field management practices were performed according to standard procedures.

[0161] Efficacy survey. The experiment used the fixed-site, fixed-plant method for investigation, with 3 sites selected for each treatment, and 10 plants fixed at each site. The initial insect population was investigated before application, and the number of surviving insects was investigated 3 and 7 days after application. The insect population reduction rate and control effect were calculated.

[0162] The relevant calculation formulas are as follows:

[0163]

[0164]

[0165] Table 7 Results of field efficacy trials for controlling beet armyworm

[0166]

[0167] Field efficacy trials showed that the appropriate combination of dimpropyridaz and compound II exhibited high field control efficacy against beet armyworm. Three days after application, the effective component of each compound formulation was 25 g / hm². 2 The efficacy was significantly higher than the single-dose control. Seven days after application, the efficacy of Preparation Example 2: 22% dimpropyridaz•Formula II compound suspension (10:1) was still above 95%, comparable to Preparation Example 8: 32% dimpropyridaz•Formula II compound water-dispersible granules (15:1) at the same dosage, and higher than Preparation Example 4: 11% dimpropyridaz•Formula II compound emulsifiable concentrate (1:10). The efficacy of the compound formulations was significantly higher than that of the 25% Formula II compound water-dispersible granules and the 20% dimpropyridaz suspension.

[0168] Example 5: Field efficacy test for controlling rice planthoppers.

[0169] Experimental location: The experiment was conducted in paddy fields in Youyi Village, Yisuhe Town, Xiangtan County, Xiangtan City, Hunan Province. The soil was yellow clay with moderate fertility.

[0170] Experimental crop: Rice (Taiyou 390).

[0171] Experimental Design: This experiment included 6 treatments, with each treatment replicated 4 times, and a plot area of ​​30m². 2 Arranged in random blocks, with external protection rows, and embankments built between blocks to ensure independent irrigation and drainage for each block.

[0172] Experimental method: The pesticide was applied using a Xiangfeng brand 3WBD-16 electric backpack sprayer, with a water consumption of 450 kg / hm². 2 Apply the pesticide evenly to the entire rice plant. At the end of the rice tillering stage, when the young nymphs of rice planthoppers are just hatching and beginning to emerge in the field, spray the base of the rice stems and leaves evenly once, using 750 L / hm² of water. 2 After applying the pesticide, maintain a water depth of 3-5 cm in the paddy field. Do not apply other pesticides to control rice planthoppers during the pesticide application period.

[0173] Survey methods: The initial planthopper population was assessed before pesticide application. The number of surviving planthoppers was assessed 1, 3, and 7 days after application. Ten sampling points were taken from each plot using a parallel skip sampling method, with two rice clumps sampled at each point. The control effect was calculated based on the planthopper population reduction rate in the pesticide-treated area and the control area.

[0174] The method for calculating drug efficacy is as follows:

[0175]

[0176]

[0177] The results of the field efficacy trials are shown in the table below:

[0178] Table 8 Results of field efficacy trials for controlling rice planthoppers.

[0179]

[0180] Overall, the three test agents—Preparation Example 1: 22% dimpropyridaz • Formula I compound suspension (10:1), Preparation Example 5: 18% dimpropyridaz • Formula I compound dispersible oil suspension (1:2), and Preparation Example 7: 24% dimpropyridaz • Formula I compound water dispersible granules (1:5)—showed relatively high overall control efficacy.

Claims

1. A pesticide composition, characterized in that, The pesticide composition comprises active ingredient A and active ingredient B, wherein active ingredient A is dimpropyridaz and active ingredient B is a compound of formula II. (Formula II), wherein the mass ratio of active ingredient A to active ingredient B is 1:40 to 60:

1.

2. The pesticide composition according to claim 1, characterized in that, The active ingredient B is a compound of formula II, and the mass ratio of active ingredient A to active ingredient B is 1:22 to 40:

1.

3. The pesticide composition according to claim 1, characterized in that, In addition to the active ingredient, the pesticide composition contains pesticide-acceptable auxiliary ingredients, which are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

4. The pesticide composition according to claim 1, characterized in that, The pesticide composition is prepared as a solid or liquid formulation.

5. The pesticide composition according to claim 4, characterized in that, The solid formulation is a water-dispersible granule or a wettable powder; the liquid formulation is a suspension concentrate, emulsifiable concentrate, water emulsion, microemulsion, or dispersible oil suspension.

6. The use of the pesticide composition according to any one of claims 1-5 for the control of crop pests, characterized in that, The pests mentioned are lepidopteran pests, specifically the beet armyworm or diamondback moth.

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